Initial revision

1 files changed, 865 insertions, 0 deletions

diff --git a/generic/tkMenubutton.c b/generic/tkMenubutton.c
new file mode 100644
index 0000000..ca2070e
--- /dev/null
+++ b/generic/tkMenubutton.c
@@ -0,0 +1,865 @@
+/* 
+ * tkMenubutton.c --
+ *
+ *	This module implements button-like widgets that are used
+ *	to invoke pull-down menus.
+ *
+ * Copyright (c) 1990-1994 The Regents of the University of California.
+ * Copyright (c) 1994-1997 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * SCCS: @(#) tkMenubutton.c 1.94 97/07/31 09:10:37
+ */
+
+#include "tkMenubutton.h"
+#include "tkPort.h"
+#include "default.h"
+
+/*
+ * Uids internal to menubuttons.
+ */
+
+static Tk_Uid aboveUid = NULL;
+static Tk_Uid belowUid = NULL;
+static Tk_Uid leftUid = NULL;
+static Tk_Uid rightUid = NULL;
+static Tk_Uid flushUid = NULL;
+
+/*
+ * Information used for parsing configuration specs:
+ */
+
+static Tk_ConfigSpec configSpecs[] = {
+    {TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground",
+	DEF_MENUBUTTON_ACTIVE_BG_COLOR, Tk_Offset(TkMenuButton, activeBorder),
+	TK_CONFIG_COLOR_ONLY},
+    {TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground",
+	DEF_MENUBUTTON_ACTIVE_BG_MONO, Tk_Offset(TkMenuButton, activeBorder),
+	TK_CONFIG_MONO_ONLY},
+    {TK_CONFIG_COLOR, "-activeforeground", "activeForeground", "Background",
+	DEF_MENUBUTTON_ACTIVE_FG_COLOR, Tk_Offset(TkMenuButton, activeFg),
+	TK_CONFIG_COLOR_ONLY},
+    {TK_CONFIG_COLOR, "-activeforeground", "activeForeground", "Background",
+	DEF_MENUBUTTON_ACTIVE_FG_MONO, Tk_Offset(TkMenuButton, activeFg),
+	TK_CONFIG_MONO_ONLY},
+    {TK_CONFIG_ANCHOR, "-anchor", "anchor", "Anchor",
+	DEF_MENUBUTTON_ANCHOR, Tk_Offset(TkMenuButton, anchor), 0},
+    {TK_CONFIG_BORDER, "-background", "background", "Background",
+	DEF_MENUBUTTON_BG_COLOR, Tk_Offset(TkMenuButton, normalBorder),
+	TK_CONFIG_COLOR_ONLY},
+    {TK_CONFIG_BORDER, "-background", "background", "Background",
+	DEF_MENUBUTTON_BG_MONO, Tk_Offset(TkMenuButton, normalBorder),
+	TK_CONFIG_MONO_ONLY},
+    {TK_CONFIG_SYNONYM, "-bd", "borderWidth", (char *) NULL,
+	(char *) NULL, 0, 0},
+    {TK_CONFIG_SYNONYM, "-bg", "background", (char *) NULL,
+	(char *) NULL, 0, 0},
+    {TK_CONFIG_BITMAP, "-bitmap", "bitmap", "Bitmap",
+	DEF_MENUBUTTON_BITMAP, Tk_Offset(TkMenuButton, bitmap),
+	TK_CONFIG_NULL_OK},
+    {TK_CONFIG_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
+	DEF_MENUBUTTON_BORDER_WIDTH, Tk_Offset(TkMenuButton, borderWidth), 0},
+    {TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor",
+	DEF_MENUBUTTON_CURSOR, Tk_Offset(TkMenuButton, cursor),
+	TK_CONFIG_NULL_OK},
+    {TK_CONFIG_UID, "-direction", "direction", "Direction",
+    	DEF_MENUBUTTON_DIRECTION, Tk_Offset(TkMenuButton, direction), 
+	0},
+    {TK_CONFIG_COLOR, "-disabledforeground", "disabledForeground",
+	"DisabledForeground", DEF_MENUBUTTON_DISABLED_FG_COLOR,
+	Tk_Offset(TkMenuButton, disabledFg),
+	TK_CONFIG_COLOR_ONLY|TK_CONFIG_NULL_OK},
+    {TK_CONFIG_COLOR, "-disabledforeground", "disabledForeground",
+	"DisabledForeground", DEF_MENUBUTTON_DISABLED_FG_MONO,
+	Tk_Offset(TkMenuButton, disabledFg),
+	TK_CONFIG_MONO_ONLY|TK_CONFIG_NULL_OK},
+    {TK_CONFIG_SYNONYM, "-fg", "foreground", (char *) NULL,
+	(char *) NULL, 0, 0},
+    {TK_CONFIG_FONT, "-font", "font", "Font",
+	DEF_MENUBUTTON_FONT, Tk_Offset(TkMenuButton, tkfont), 0},
+    {TK_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
+	DEF_MENUBUTTON_FG, Tk_Offset(TkMenuButton, normalFg), 0},
+    {TK_CONFIG_STRING, "-height", "height", "Height",
+	DEF_MENUBUTTON_HEIGHT, Tk_Offset(TkMenuButton, heightString), 0},
+    {TK_CONFIG_COLOR, "-highlightbackground", "highlightBackground",
+	"HighlightBackground", DEF_MENUBUTTON_HIGHLIGHT_BG,
+	Tk_Offset(TkMenuButton, highlightBgColorPtr), 0},
+    {TK_CONFIG_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
+	DEF_MENUBUTTON_HIGHLIGHT, Tk_Offset(TkMenuButton, highlightColorPtr),
+	0},
+    {TK_CONFIG_PIXELS, "-highlightthickness", "highlightThickness",
+	"HighlightThickness", DEF_MENUBUTTON_HIGHLIGHT_WIDTH,
+	Tk_Offset(TkMenuButton, highlightWidth), 0},
+    {TK_CONFIG_STRING, "-image", "image", "Image",
+	DEF_MENUBUTTON_IMAGE, Tk_Offset(TkMenuButton, imageString),
+	TK_CONFIG_NULL_OK},
+    {TK_CONFIG_BOOLEAN, "-indicatoron", "indicatorOn", "IndicatorOn",
+	DEF_MENUBUTTON_INDICATOR, Tk_Offset(TkMenuButton, indicatorOn), 0},
+    {TK_CONFIG_JUSTIFY, "-justify", "justify", "Justify",
+	DEF_MENUBUTTON_JUSTIFY, Tk_Offset(TkMenuButton, justify), 0},
+    {TK_CONFIG_STRING, "-menu", "menu", "Menu",
+	DEF_MENUBUTTON_MENU, Tk_Offset(TkMenuButton, menuName),
+	TK_CONFIG_NULL_OK},
+    {TK_CONFIG_PIXELS, "-padx", "padX", "Pad",
+	DEF_MENUBUTTON_PADX, Tk_Offset(TkMenuButton, padX), 0},
+    {TK_CONFIG_PIXELS, "-pady", "padY", "Pad",
+	DEF_MENUBUTTON_PADY, Tk_Offset(TkMenuButton, padY), 0},
+    {TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
+	DEF_MENUBUTTON_RELIEF, Tk_Offset(TkMenuButton, relief), 0},
+    {TK_CONFIG_UID, "-state", "state", "State",
+	DEF_MENUBUTTON_STATE, Tk_Offset(TkMenuButton, state), 0},
+    {TK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
+	DEF_MENUBUTTON_TAKE_FOCUS, Tk_Offset(TkMenuButton, takeFocus),
+	TK_CONFIG_NULL_OK},
+    {TK_CONFIG_STRING, "-text", "text", "Text",
+	DEF_MENUBUTTON_TEXT, Tk_Offset(TkMenuButton, text), 0},
+    {TK_CONFIG_STRING, "-textvariable", "textVariable", "Variable",
+	DEF_MENUBUTTON_TEXT_VARIABLE, Tk_Offset(TkMenuButton, textVarName),
+	TK_CONFIG_NULL_OK},
+    {TK_CONFIG_INT, "-underline", "underline", "Underline",
+	DEF_MENUBUTTON_UNDERLINE, Tk_Offset(TkMenuButton, underline), 0},
+    {TK_CONFIG_STRING, "-width", "width", "Width",
+	DEF_MENUBUTTON_WIDTH, Tk_Offset(TkMenuButton, widthString), 0},
+    {TK_CONFIG_PIXELS, "-wraplength", "wrapLength", "WrapLength",
+	DEF_MENUBUTTON_WRAP_LENGTH, Tk_Offset(TkMenuButton, wrapLength), 0},
+    {TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
+	(char *) NULL, 0, 0}
+};
+
+/*
+ * Forward declarations for procedures defined later in this file:
+ */
+
+static void		MenuButtonCmdDeletedProc _ANSI_ARGS_((
+			    ClientData clientData));
+static void		MenuButtonEventProc _ANSI_ARGS_((ClientData clientData,
+			    XEvent *eventPtr));
+static void		MenuButtonImageProc _ANSI_ARGS_((ClientData clientData,
+			    int x, int y, int width, int height, int imgWidth,
+			    int imgHeight));
+static char *		MenuButtonTextVarProc _ANSI_ARGS_((
+			    ClientData clientData, Tcl_Interp *interp,
+			    char *name1, char *name2, int flags));
+static int		MenuButtonWidgetCmd _ANSI_ARGS_((ClientData clientData,
+			    Tcl_Interp *interp, int argc, char **argv));
+static int		ConfigureMenuButton _ANSI_ARGS_((Tcl_Interp *interp,
+			    TkMenuButton *mbPtr, int argc, char **argv,
+			    int flags));
+static void		DestroyMenuButton _ANSI_ARGS_((char *memPtr));
+
+/*
+ *--------------------------------------------------------------
+ *
+ * Tk_MenubuttonCmd --
+ *
+ *	This procedure is invoked to process the "button", "label",
+ *	"radiobutton", and "checkbutton" Tcl commands.  See the
+ *	user documentation for details on what it does.
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *	See the user documentation.
+ *
+ *--------------------------------------------------------------
+ */
+
+int
+Tk_MenubuttonCmd(clientData, interp, argc, argv)
+    ClientData clientData;	/* Main window associated with
+				 * interpreter. */
+    Tcl_Interp *interp;		/* Current interpreter. */
+    int argc;			/* Number of arguments. */
+    char **argv;		/* Argument strings. */
+{
+    register TkMenuButton *mbPtr;
+    Tk_Window tkwin = (Tk_Window) clientData;
+    Tk_Window new;
+
+    if (argc < 2) {
+	Tcl_AppendResult(interp, "wrong # args: should be \"",
+		argv[0], " pathName ?options?\"", (char *) NULL);
+	return TCL_ERROR;
+    }
+
+    /*
+     * Create the new window.
+     */
+
+    new = Tk_CreateWindowFromPath(interp, tkwin, argv[1], (char *) NULL);
+    if (new == NULL) {
+	return TCL_ERROR;
+    }
+
+    Tk_SetClass(new, "Menubutton");
+    mbPtr = TkpCreateMenuButton(new);
+
+    TkSetClassProcs(new, &tkpMenubuttonClass, (ClientData) mbPtr);
+
+    /*
+     * Initialize the data structure for the button.
+     */
+
+    mbPtr->tkwin = new;
+    mbPtr->display = Tk_Display (new);
+    mbPtr->interp = interp;
+    mbPtr->widgetCmd = Tcl_CreateCommand(interp, Tk_PathName(mbPtr->tkwin),
+	    MenuButtonWidgetCmd, (ClientData) mbPtr, MenuButtonCmdDeletedProc);
+    mbPtr->menuName = NULL;
+    mbPtr->text = NULL;
+    mbPtr->underline = -1;
+    mbPtr->textVarName = NULL;
+    mbPtr->bitmap = None;
+    mbPtr->imageString = NULL;
+    mbPtr->image = NULL;
+    mbPtr->state = tkNormalUid;
+    mbPtr->normalBorder = NULL;
+    mbPtr->activeBorder = NULL;
+    mbPtr->borderWidth = 0;
+    mbPtr->relief = TK_RELIEF_FLAT;
+    mbPtr->highlightWidth = 0;
+    mbPtr->highlightBgColorPtr = NULL;
+    mbPtr->highlightColorPtr = NULL;
+    mbPtr->inset = 0;
+    mbPtr->tkfont = NULL;
+    mbPtr->normalFg = NULL;
+    mbPtr->activeFg = NULL;
+    mbPtr->disabledFg = NULL;
+    mbPtr->normalTextGC = None;
+    mbPtr->activeTextGC = None;
+    mbPtr->gray = None;
+    mbPtr->disabledGC = None;
+    mbPtr->leftBearing = 0;
+    mbPtr->rightBearing = 0;
+    mbPtr->widthString = NULL;
+    mbPtr->heightString = NULL;
+    mbPtr->width = 0;
+    mbPtr->width = 0;
+    mbPtr->wrapLength = 0;
+    mbPtr->padX = 0;
+    mbPtr->padY = 0;
+    mbPtr->anchor = TK_ANCHOR_CENTER;
+    mbPtr->justify = TK_JUSTIFY_CENTER;
+    mbPtr->textLayout = NULL;
+    mbPtr->indicatorOn = 0;
+    mbPtr->indicatorWidth = 0;
+    mbPtr->indicatorHeight = 0;
+    mbPtr->cursor = None;
+    mbPtr->takeFocus = NULL;
+    mbPtr->flags = 0;
+    if (aboveUid == NULL) {
+	aboveUid = Tk_GetUid("above");
+	belowUid = Tk_GetUid("below");
+	leftUid = Tk_GetUid("left");
+	rightUid = Tk_GetUid("right");
+	flushUid = Tk_GetUid("flush");
+    }
+    mbPtr->direction = flushUid;
+
+    Tk_CreateEventHandler(mbPtr->tkwin,
+	    ExposureMask|StructureNotifyMask|FocusChangeMask,
+	    MenuButtonEventProc, (ClientData) mbPtr);
+    if (ConfigureMenuButton(interp, mbPtr, argc-2, argv+2, 0) != TCL_OK) {
+	Tk_DestroyWindow(mbPtr->tkwin);
+	return TCL_ERROR;
+    }
+
+    interp->result = Tk_PathName(mbPtr->tkwin);
+    return TCL_OK;
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * MenuButtonWidgetCmd --
+ *
+ *	This procedure is invoked to process the Tcl command
+ *	that corresponds to a widget managed by this module.
+ *	See the user documentation for details on what it does.
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *	See the user documentation.
+ *
+ *--------------------------------------------------------------
+ */
+
+static int
+MenuButtonWidgetCmd(clientData, interp, argc, argv)
+    ClientData clientData;	/* Information about button widget. */
+    Tcl_Interp *interp;		/* Current interpreter. */
+    int argc;			/* Number of arguments. */
+    char **argv;		/* Argument strings. */
+{
+    register TkMenuButton *mbPtr = (TkMenuButton *) clientData;
+    int result;
+    size_t length;
+    int c;
+
+    if (argc < 2) {
+	Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
+		" option ?arg arg ...?\"", (char *) NULL);
+	return TCL_ERROR;
+    }
+    Tcl_Preserve((ClientData) mbPtr);
+    c = argv[1][0];
+    length = strlen(argv[1]);
+    if ((c == 'c') && (strncmp(argv[1], "cget", length) == 0)
+	    && (length >= 2)) {
+	if (argc != 3) {
+	    Tcl_AppendResult(interp, "wrong # args: should be \"",
+		    argv[0], " cget option\"",
+		    (char *) NULL);
+	    result = TCL_ERROR;
+	} else {
+	    result = Tk_ConfigureValue(interp, mbPtr->tkwin, configSpecs,
+		    (char *) mbPtr, argv[2], 0);
+	}
+    } else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)
+	    && (length >= 2)) {
+	if (argc == 2) {
+	    result = Tk_ConfigureInfo(interp, mbPtr->tkwin, configSpecs,
+		    (char *) mbPtr, (char *) NULL, 0);
+	} else if (argc == 3) {
+	    result = Tk_ConfigureInfo(interp, mbPtr->tkwin, configSpecs,
+		    (char *) mbPtr, argv[2], 0);
+	} else {
+	    result = ConfigureMenuButton(interp, mbPtr, argc-2, argv+2,
+		    TK_CONFIG_ARGV_ONLY);
+	}
+    } else {
+	Tcl_AppendResult(interp, "bad option \"", argv[1],
+		"\": must be cget or configure",
+		(char *) NULL);
+	result = TCL_ERROR;
+    }
+    Tcl_Release((ClientData) mbPtr);
+    return result;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * DestroyMenuButton --
+ *
+ *	This procedure is invoked to recycle all of the resources
+ *	associated with a button widget.  It is invoked as a
+ *	when-idle handler in order to make sure that there is no
+ *	other use of the button pending at the time of the deletion.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Everything associated with the widget is freed up.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+DestroyMenuButton(memPtr)
+    char *memPtr;		/* Info about button widget. */
+{
+    register TkMenuButton *mbPtr = (TkMenuButton *) memPtr;
+
+    /*
+     * Free up all the stuff that requires special handling, then
+     * let Tk_FreeOptions handle all the standard option-related
+     * stuff.
+     */
+
+    if (mbPtr->textVarName != NULL) {
+	Tcl_UntraceVar(mbPtr->interp, mbPtr->textVarName,
+		TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
+		MenuButtonTextVarProc, (ClientData) mbPtr);
+    }
+    if (mbPtr->image != NULL) {
+	Tk_FreeImage(mbPtr->image);
+    }
+    if (mbPtr->normalTextGC != None) {
+	Tk_FreeGC(mbPtr->display, mbPtr->normalTextGC);
+    }
+    if (mbPtr->activeTextGC != None) {
+	Tk_FreeGC(mbPtr->display, mbPtr->activeTextGC);
+    }
+    if (mbPtr->gray != None) {
+	Tk_FreeBitmap(mbPtr->display, mbPtr->gray);
+    }
+    if (mbPtr->disabledGC != None) {
+	Tk_FreeGC(mbPtr->display, mbPtr->disabledGC);
+    }
+    Tk_FreeTextLayout(mbPtr->textLayout);
+    Tk_FreeOptions(configSpecs, (char *) mbPtr, mbPtr->display, 0);
+    ckfree((char *) mbPtr);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ConfigureMenuButton --
+ *
+ *	This procedure is called to process an argv/argc list, plus
+ *	the Tk option database, in order to configure (or
+ *	reconfigure) a menubutton widget.
+ *
+ * Results:
+ *	The return value is a standard Tcl result.  If TCL_ERROR is
+ *	returned, then interp->result contains an error message.
+ *
+ * Side effects:
+ *	Configuration information, such as text string, colors, font,
+ *	etc. get set for mbPtr;  old resources get freed, if there
+ *	were any.  The menubutton is redisplayed.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+ConfigureMenuButton(interp, mbPtr, argc, argv, flags)
+    Tcl_Interp *interp;		/* Used for error reporting. */
+    register TkMenuButton *mbPtr;	/* Information about widget;  may or may
+				 * not already have values for some fields. */
+    int argc;			/* Number of valid entries in argv. */
+    char **argv;		/* Arguments. */
+    int flags;			/* Flags to pass to Tk_ConfigureWidget. */
+{
+    int result;
+    Tk_Image image;
+
+    /*
+     * Eliminate any existing trace on variables monitored by the menubutton.
+     */
+
+    if (mbPtr->textVarName != NULL) {
+	Tcl_UntraceVar(interp, mbPtr->textVarName,
+		TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
+		MenuButtonTextVarProc, (ClientData) mbPtr);
+    }
+
+    result = Tk_ConfigureWidget(interp, mbPtr->tkwin, configSpecs,
+	    argc, argv, (char *) mbPtr, flags);
+    if (result != TCL_OK) {
+	return TCL_ERROR;
+    }
+
+    /*
+     * A few options need special processing, such as setting the
+     * background from a 3-D border, or filling in complicated
+     * defaults that couldn't be specified to Tk_ConfigureWidget.
+     */
+
+    if ((mbPtr->state == tkActiveUid) && !Tk_StrictMotif(mbPtr->tkwin)) {
+	Tk_SetBackgroundFromBorder(mbPtr->tkwin, mbPtr->activeBorder);
+    } else {
+	Tk_SetBackgroundFromBorder(mbPtr->tkwin, mbPtr->normalBorder);
+	if ((mbPtr->state != tkNormalUid) && (mbPtr->state != tkActiveUid)
+		&& (mbPtr->state != tkDisabledUid)) {
+	    Tcl_AppendResult(interp, "bad state value \"", mbPtr->state,
+		    "\": must be normal, active, or disabled", (char *) NULL);
+	    mbPtr->state = tkNormalUid;
+	    return TCL_ERROR;
+	}
+    }
+
+    if ((mbPtr->direction != aboveUid) && (mbPtr->direction != belowUid)
+	    && (mbPtr->direction != leftUid) && (mbPtr->direction != rightUid)
+	    && (mbPtr->direction != flushUid)) {
+	Tcl_AppendResult(interp, "bad direction value \"", mbPtr->direction,
+		"\": must be above, below, left, right, or flush",
+		(char *) NULL);
+	mbPtr->direction = belowUid;
+	return TCL_ERROR;
+    }
+    
+    if (mbPtr->highlightWidth < 0) {
+	mbPtr->highlightWidth = 0;
+    }
+
+    if (mbPtr->padX < 0) {
+	mbPtr->padX = 0;
+    }
+    if (mbPtr->padY < 0) {
+	mbPtr->padY = 0;
+    }
+
+    /*
+     * Get the image for the widget, if there is one.  Allocate the
+     * new image before freeing the old one, so that the reference
+     * count doesn't go to zero and cause image data to be discarded.
+     */
+
+    if (mbPtr->imageString != NULL) {
+	image = Tk_GetImage(mbPtr->interp, mbPtr->tkwin,
+		mbPtr->imageString, MenuButtonImageProc, (ClientData) mbPtr);
+	if (image == NULL) {
+	    return TCL_ERROR;
+	}
+    } else {
+	image = NULL;
+    }
+    if (mbPtr->image != NULL) {
+	Tk_FreeImage(mbPtr->image);
+    }
+    mbPtr->image = image;
+
+    if ((mbPtr->image == NULL) && (mbPtr->bitmap == None)
+	    && (mbPtr->textVarName != NULL)) {
+	/*
+	 * The menubutton displays a variable.  Set up a trace to watch
+	 * for any changes in it.
+	 */
+
+	char *value;
+
+	value = Tcl_GetVar(interp, mbPtr->textVarName, TCL_GLOBAL_ONLY);
+	if (value == NULL) {
+	    Tcl_SetVar(interp, mbPtr->textVarName, mbPtr->text,
+		    TCL_GLOBAL_ONLY);
+	} else {
+	    if (mbPtr->text != NULL) {
+		ckfree(mbPtr->text);
+	    }
+	    mbPtr->text = (char *) ckalloc((unsigned) (strlen(value) + 1));
+	    strcpy(mbPtr->text, value);
+	}
+	Tcl_TraceVar(interp, mbPtr->textVarName,
+		TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
+		MenuButtonTextVarProc, (ClientData) mbPtr);
+    }
+
+    /*
+     * Recompute the geometry for the button.
+     */
+
+    if ((mbPtr->bitmap != None) || (mbPtr->image != NULL)) {
+	if (Tk_GetPixels(interp, mbPtr->tkwin, mbPtr->widthString,
+		&mbPtr->width) != TCL_OK) {
+	    widthError:
+	    Tcl_AddErrorInfo(interp, "\n    (processing -width option)");
+	    return TCL_ERROR;
+	}
+	if (Tk_GetPixels(interp, mbPtr->tkwin, mbPtr->heightString,
+		&mbPtr->height) != TCL_OK) {
+	    heightError:
+	    Tcl_AddErrorInfo(interp, "\n    (processing -height option)");
+	    return TCL_ERROR;
+	}
+    } else {
+	if (Tcl_GetInt(interp, mbPtr->widthString, &mbPtr->width)
+		!= TCL_OK) {
+	    goto widthError;
+	}
+	if (Tcl_GetInt(interp, mbPtr->heightString, &mbPtr->height)
+		!= TCL_OK) {
+	    goto heightError;
+	}
+    }
+    TkMenuButtonWorldChanged((ClientData) mbPtr);
+    return TCL_OK;
+}
+
+/*
+ *---------------------------------------------------------------------------
+ *
+ * TkMenuButtonWorldChanged --
+ *
+ *      This procedure is called when the world has changed in some
+ *      way and the widget needs to recompute all its graphics contexts
+ *	and determine its new geometry.
+ *
+ * Results:
+ *      None.
+ *
+ * Side effects:
+ *      TkMenuButton will be relayed out and redisplayed.
+ *
+ *---------------------------------------------------------------------------
+ */
+ 
+void
+TkMenuButtonWorldChanged(instanceData)
+    ClientData instanceData;	/* Information about widget. */
+{
+    XGCValues gcValues;
+    GC gc;
+    unsigned long mask;
+    TkMenuButton *mbPtr;
+
+    mbPtr = (TkMenuButton *) instanceData;
+
+    gcValues.font = Tk_FontId(mbPtr->tkfont);
+    gcValues.foreground = mbPtr->normalFg->pixel;
+    gcValues.background = Tk_3DBorderColor(mbPtr->normalBorder)->pixel;
+
+    /*
+     * Note: GraphicsExpose events are disabled in GC's because they're
+     * used to copy stuff from an off-screen pixmap onto the screen (we know
+     * that there's no problem with obscured areas).
+     */
+
+    gcValues.graphics_exposures = False;
+    mask = GCForeground | GCBackground | GCFont | GCGraphicsExposures;
+    gc = Tk_GetGC(mbPtr->tkwin, mask, &gcValues);
+    if (mbPtr->normalTextGC != None) {
+	Tk_FreeGC(mbPtr->display, mbPtr->normalTextGC);
+    }
+    mbPtr->normalTextGC = gc;
+
+    gcValues.font = Tk_FontId(mbPtr->tkfont);
+    gcValues.foreground = mbPtr->activeFg->pixel;
+    gcValues.background = Tk_3DBorderColor(mbPtr->activeBorder)->pixel;
+    mask = GCForeground | GCBackground | GCFont;
+    gc = Tk_GetGC(mbPtr->tkwin, mask, &gcValues);
+    if (mbPtr->activeTextGC != None) {
+	Tk_FreeGC(mbPtr->display, mbPtr->activeTextGC);
+    }
+    mbPtr->activeTextGC = gc;
+
+    gcValues.font = Tk_FontId(mbPtr->tkfont);
+    gcValues.background = Tk_3DBorderColor(mbPtr->normalBorder)->pixel;
+    if ((mbPtr->disabledFg != NULL) && (mbPtr->imageString == NULL)) {
+	gcValues.foreground = mbPtr->disabledFg->pixel;
+	mask = GCForeground | GCBackground | GCFont;
+    } else {
+	gcValues.foreground = gcValues.background;
+	mask = GCForeground;
+	if (mbPtr->gray == None) {
+	    mbPtr->gray = Tk_GetBitmap(NULL, mbPtr->tkwin,
+		    Tk_GetUid("gray50"));
+	}
+	if (mbPtr->gray != None) {
+	    gcValues.fill_style = FillStippled;
+	    gcValues.stipple = mbPtr->gray;
+	    mask |= GCFillStyle | GCStipple;
+	}
+    }
+    gc = Tk_GetGC(mbPtr->tkwin, mask, &gcValues);
+    if (mbPtr->disabledGC != None) {
+	Tk_FreeGC(mbPtr->display, mbPtr->disabledGC);
+    }
+    mbPtr->disabledGC = gc;
+
+    TkpComputeMenuButtonGeometry(mbPtr);
+
+    /*
+     * Lastly, arrange for the button to be redisplayed.
+     */
+
+    if (Tk_IsMapped(mbPtr->tkwin) && !(mbPtr->flags & REDRAW_PENDING)) {
+	Tcl_DoWhenIdle(TkpDisplayMenuButton, (ClientData) mbPtr);
+	mbPtr->flags |= REDRAW_PENDING;
+    }
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * MenuButtonEventProc --
+ *
+ *	This procedure is invoked by the Tk dispatcher for various
+ *	events on buttons.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	When the window gets deleted, internal structures get
+ *	cleaned up.  When it gets exposed, it is redisplayed.
+ *
+ *--------------------------------------------------------------
+ */
+
+static void
+MenuButtonEventProc(clientData, eventPtr)
+    ClientData clientData;	/* Information about window. */
+    XEvent *eventPtr;		/* Information about event. */
+{
+    TkMenuButton *mbPtr = (TkMenuButton *) clientData;
+    if ((eventPtr->type == Expose) && (eventPtr->xexpose.count == 0)) {
+	goto redraw;
+    } else if (eventPtr->type == ConfigureNotify) {
+	/*
+	 * Must redraw after size changes, since layout could have changed
+	 * and borders will need to be redrawn.
+	 */
+
+	goto redraw;
+    } else if (eventPtr->type == DestroyNotify) {
+	TkpDestroyMenuButton(mbPtr);
+	if (mbPtr->tkwin != NULL) {
+	    mbPtr->tkwin = NULL;
+	    Tcl_DeleteCommandFromToken(mbPtr->interp, mbPtr->widgetCmd);
+	}
+	if (mbPtr->flags & REDRAW_PENDING) {
+	    Tcl_CancelIdleCall(TkpDisplayMenuButton, (ClientData) mbPtr);
+	}
+	Tcl_EventuallyFree((ClientData) mbPtr, DestroyMenuButton);
+    } else if (eventPtr->type == FocusIn) {
+	if (eventPtr->xfocus.detail != NotifyInferior) {
+	    mbPtr->flags |= GOT_FOCUS;
+	    if (mbPtr->highlightWidth > 0) {
+		goto redraw;
+	    }
+	}
+    } else if (eventPtr->type == FocusOut) {
+	if (eventPtr->xfocus.detail != NotifyInferior) {
+	    mbPtr->flags &= ~GOT_FOCUS;
+	    if (mbPtr->highlightWidth > 0) {
+		goto redraw;
+	    }
+	}
+    }
+    return;
+
+    redraw:
+    if ((mbPtr->tkwin != NULL) && !(mbPtr->flags & REDRAW_PENDING)) {
+	Tcl_DoWhenIdle(TkpDisplayMenuButton, (ClientData) mbPtr);
+	mbPtr->flags |= REDRAW_PENDING;
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * MenuButtonCmdDeletedProc --
+ *
+ *	This procedure is invoked when a widget command is deleted.  If
+ *	the widget isn't already in the process of being destroyed,
+ *	this command destroys it.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	The widget is destroyed.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+MenuButtonCmdDeletedProc(clientData)
+    ClientData clientData;	/* Pointer to widget record for widget. */
+{
+    TkMenuButton *mbPtr = (TkMenuButton *) clientData;
+    Tk_Window tkwin = mbPtr->tkwin;
+
+    /*
+     * This procedure could be invoked either because the window was
+     * destroyed and the command was then deleted (in which case tkwin
+     * is NULL) or because the command was deleted, and then this procedure
+     * destroys the widget.
+     */
+
+    if (tkwin != NULL) {
+	mbPtr->tkwin = NULL;
+	Tk_DestroyWindow(tkwin);
+    }
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * MenuButtonTextVarProc --
+ *
+ *	This procedure is invoked when someone changes the variable
+ *	whose contents are to be displayed in a menu button.
+ *
+ * Results:
+ *	NULL is always returned.
+ *
+ * Side effects:
+ *	The text displayed in the menu button will change to match the
+ *	variable.
+ *
+ *--------------------------------------------------------------
+ */
+
+	/* ARGSUSED */
+static char *
+MenuButtonTextVarProc(clientData, interp, name1, name2, flags)
+    ClientData clientData;	/* Information about button. */
+    Tcl_Interp *interp;		/* Interpreter containing variable. */
+    char *name1;		/* Name of variable. */
+    char *name2;		/* Second part of variable name. */
+    int flags;			/* Information about what happened. */
+{
+    register TkMenuButton *mbPtr = (TkMenuButton *) clientData;
+    char *value;
+
+    /*
+     * If the variable is unset, then immediately recreate it unless
+     * the whole interpreter is going away.
+     */
+
+    if (flags & TCL_TRACE_UNSETS) {
+	if ((flags & TCL_TRACE_DESTROYED) && !(flags & TCL_INTERP_DESTROYED)) {
+	    Tcl_SetVar(interp, mbPtr->textVarName, mbPtr->text,
+		    TCL_GLOBAL_ONLY);
+	    Tcl_TraceVar(interp, mbPtr->textVarName,
+		    TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
+		    MenuButtonTextVarProc, clientData);
+	}
+	return (char *) NULL;
+    }
+
+    value = Tcl_GetVar(interp, mbPtr->textVarName, TCL_GLOBAL_ONLY);
+    if (value == NULL) {
+	value = "";
+    }
+    if (mbPtr->text != NULL) {
+	ckfree(mbPtr->text);
+    }
+    mbPtr->text = (char *) ckalloc((unsigned) (strlen(value) + 1));
+    strcpy(mbPtr->text, value);
+    TkpComputeMenuButtonGeometry(mbPtr);
+
+    if ((mbPtr->tkwin != NULL) && Tk_IsMapped(mbPtr->tkwin)
+	    && !(mbPtr->flags & REDRAW_PENDING)) {
+	Tcl_DoWhenIdle(TkpDisplayMenuButton, (ClientData) mbPtr);
+	mbPtr->flags |= REDRAW_PENDING;
+    }
+    return (char *) NULL;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * MenuButtonImageProc --
+ *
+ *	This procedure is invoked by the image code whenever the manager
+ *	for an image does something that affects the size of contents
+ *	of an image displayed in a button.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Arranges for the button to get redisplayed.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+MenuButtonImageProc(clientData, x, y, width, height, imgWidth, imgHeight)
+    ClientData clientData;		/* Pointer to widget record. */
+    int x, y;				/* Upper left pixel (within image)
+					 * that must be redisplayed. */
+    int width, height;			/* Dimensions of area to redisplay
+					 * (may be <= 0). */
+    int imgWidth, imgHeight;		/* New dimensions of image. */
+{
+    register TkMenuButton *mbPtr = (TkMenuButton *) clientData;
+
+    if (mbPtr->tkwin != NULL) {
+	TkpComputeMenuButtonGeometry(mbPtr);
+	if (Tk_IsMapped(mbPtr->tkwin) && !(mbPtr->flags & REDRAW_PENDING)) {
+	    Tcl_DoWhenIdle(TkpDisplayMenuButton, (ClientData) mbPtr);
+	    mbPtr->flags |= REDRAW_PENDING;
+	}
+    }
+}